Type
Zone
Age range
247.4–247.3 Ma
Early Triassic
Olenekian
Chiosella gondolelloides
Triassospathodus sosioensis
Neospathodus triangularis
247.40247.40247.39247.38247.38247.38247.37247.37247.36247.35247.35247.34247.34247.34247.33247.32247.32247.31247.31247.31247.30